Rotary engine



No. 6l5,087. Patented Nov. 29, I898.

' W. MOHR.

ROTARY ENGINE.

(Application filed Feb. 15, 1898.)

(No Model.) [Sheets-Sheet s.

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No. e|5,oa7. Pat enter! Nov. 29, I898.- w. MOHR.

ROTARY ENGINE.

. (Application filed. Feb. 15, 1898.) (No Model.) i 2 $heets-Sheet 2.

IN VENTOH A TTOHNE Y8.

UNITED STATES PATENT OFFICE.

WILLIAM MOHR, KURTZ, INDIANA.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 615,087, dated November29, 1898. Application filed February 15, 1898. Serial No. 670,418. (Nomodel.)

To all whom it Indy 00700197771.

Be it known that I, WILLIAM Mona, of Kurtz, in the county of Jackson andState of Indiana, have invented a new and Improved Rotary Engine,ofwhich the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved rotaryengine arranged to readily start at any point of the piston revolutionunder full pressure of the motive agent, the latter being used to thegreatest advantage.

The invention consists of novel features and parts and combinations ofthe same, as will be fully described hereinafter and then pointed out inthe claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a sectional side elevation of the improvement. Fig. 2 is aplan view of the same with part in section. Fig. 3 is an end elevationwith parts of the cylinder broken out. Fig. 4: is a sectional sideelevation of the cylinder and parts contained therein. Fig. 5 is a faceView of the piston and the reversing-valve. Fig. 6 is a sectional faceview of the piston. Fig. '7 is a sectional plan view of the same, andFig. 8 is an inner face view of the reversing-valve.

The improved rotary engine is provided with a continuous cylinder A,secured on a suitable frame B and containing a pistonhead 0, formedradially on a piston G, extending into an annular slot formed in theinner face of the cylinder, the said piston being secured on the maindriving-shaft D, journaled in suitable bearings on the frame B andcarrying at one end a pulley E for transmitting the rotary motion of theshaft to other machinery.

In the web of the piston O are arranged two diametrically-arranged portsa 1), opening into a chamber 0 formed on the outer face of the pistonand having an apertured cover 0 closing part of the said chamber, saidcover having an opening leading to a steam-chest F, connected by a portF with a steam-supply pipe F connected with a boiler or other suitablesource of motive-agent supply. The

steam-chest F and the port-F are formed on the outer face of thecylinder A, the chamber being closed by a suitable cover F In thechamber 0 is arranged a disk valve G, formed on its inner face with asegmental cavity G, (see Fig. 8,) to connect with either of the ports aor b and to connect said ports with an exhaust-port 0, formedtransversely in the piston O and opening into an exhaust-chamber H,arranged on the side of the piston opposite the chamber C as is plainlyillustrated in Figs. 1 and 4. An exhaust-pipe H leads from the chamber Hfor carrying off the exhaust-steam; The valve G is formed with twoshoulders G G adapted to be engaged by a lug 0 formed on the piston 0within the chamber 0 so that the valve G is carried around with thepiston, according to the direction in which the piston is running.

On the valve G is secured a stem G extending through the steam-chest Fand through a stuffing-box in the cover F to carry on its outer end awheel G nnder the control of the operator for turning the disk valve G,so that its shoulder G engages the lug O for connecting the port a, bythejcavity G with the exhaust-port c and for uncovering the port I)whenever it is desired to reverse the engine. When this takes place, thelug C engages the other shoulder G to carry the disk valve G around withthe piston O. In order to pack the latter at the slot in the cylinder A,I provide two packing-rings I I, engaging the piston at opposite faces,the packing-ring I being arranged externally of the chamber 0 and thepacking-ring I being arranged within the exhaust-chamber H.

- The rings I I are pressed inwardly against arm I may be employed asshown at the lower portion of Fig. 4, in which case setscrews I areemployed for pressing the pins I I inward to hold the packing-rings inproper contact with the piston for packing purposes.

Two abutments J J are arranged to slide diametrically opposite eachother in the cylinder A, and the outer ends of said abutments are formedwith extension-slides J J respectively, fitted to slide in suitablebearings A, secured to the main frame A. carry pairs of friction-rollersJ J", respectively, engaging the peripheral surface of a cam-wheel K,having its hub K secured to the main driving-shaft D. The cam K is soshaped that when one of the abutments is in an innermost position theother is in an outermost position, as is plainly shown in Fig. 2,

and after one abutment has been moved into an innermost position atthetime the other is still in the same position then this abutmentremains in this position a short time before moving outward, so thatboth abutments are for a short time within the cylinder. Thus theinwardly-moving abutment must be at the end of its inward stroke be forethe other moves outward, so that the full steam-pressure is on thisfirst-11am ed abutment before the other moves off to allow the steam toescape by way of the exhaust-port b, the cavity G, and the exhaust-portc to the chamber II.

\Vhen the engine is reversed, as previously explained, the port (tbecomes the exhaustport, while the port Z) is the inlet-port, but theaction is otherwise exactly the same as above mentioned, except that thepiston travels in the inverse direction. It is understood that in orderto produce the movement of the abutments'referred to it is necessary toextend the straight portion of the cam K somewhat beyond one-half of theperiphery of the cam, as indicated in Fig. 1.

A packing-ring F is arranged in the livesteam chest F for abuttingagainst the cover 0 and preventing leakage at this point.

The cylinder A is preferably made in two halves, bolted or otherwisefastened together, as indicated in the drawings.

It is understood that when the several parts are in the position shownin the drawings the live steam can readily pass from the steamchest Finto the chamber 0 and from the latter through the port (L into thecylinderbetween the piston-head C and the corresponding abutment J or J.steam against the piston-head rotates the latter in the direction of thearrow a, and when nearing the next following abutment the latter movesoutward to allow the piston-head to pass, and when the inlet-port haspassed the open abutment the latter now moves inward to confine thesteam between this abutment and the advancing piston-head. Anotherimpulse is thus given to the piston-head to rot-ate the same in thedirection of the arrow a.

lVhen the operator turns the hand-wheel G to turn the reversing-valve G,then the steam enters through the port 7) into the cylinder A to presson the piston-head C in the inverse direction of the arrow (1 and tocause a corresponding rotary motion of the piston.

The machine is very simple and durable in The slides J J The pressure ofthe construction, is not liable to get out of order, is properly packedto avoid leakage of steam, and the motive agent is utilized to thefullest advantage.

As the steam-inlet port is part of the piston, it is evident that a fullhead of steam always exerts its pressure on the piston, while a freeexhaust takes place in front of the piston to insure a full developmentof the power of the steam without, however, permitting expansion.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent 1. A valve'mechanism for rotary engines,comprising a rotating valve-seat having radially-extending steam-portstherein, and an exhaust-port extending through it between thesteam-ports, a valve therefor having a segmental annular exhaust-port inits contactface adapted to connect either radial port with thethrough-port, and having asegment-noteh formed in its periphery, and alug upon the valve-seat adapted to engage the ends of saidsegment-notch.

2. Arotaryengine,comprisingaeontinuous cylinder, having a steam-chestand a separate exhaust-chamber, a piston mounted to rotate, andextending with its rim into an annular slot in the cylinder-wall, thepiston being provided with oppositely-arranged ports, one of which isthe inlet-port, a piston-head carried by the said piston and extendinginto said cylinder, abutments slidable in the said cylinder, and areversing-valve on one face of the said piston, and arranged to uncoverone of the piston-ports to the steam-chest, to allow the motive agent topass through the uncovered port into the cylinder, the saidreversing-valve being formed at its inner face with a cavity, forconnecting the covered-up piston-port with an exhaust-port formed in thepiston, and leading to the exhaust-chamber, substantially as shown anddescribed.

A rotary engine, comprising a continuous cylinder, having a steam-chestand a separate exhaust-chamber, a piston mounted to rotate, andextending with its rim into an annular slot in the cylinder-wall, thepiston being provided with oppositely-arranged ports, one of which isthe inlet-port, a piston-head carried by the said piston and extendinginto said cylinder, abutments slidable in the said cylinder, areversing-valve on one face of the said piston, and arranged to uncoverone of the piston-ports to the steam-chest, to allow the motive agent topass through the uncovered port into the cylinder, the saidreversing-valve being formed at its inner face with a cavity, forconnecting the covered-up piston-port with an exhaust-port formed in thepiston and leading to the exhaust-chamber, and a cam-wheel for actuatingthe said abutments, rotating in unison with the piston and having itscam portion less than one half of the straight portion of its periphery,substantially as shown and described.

4. A rotary engine, comprisinga continuous cylinder, having asteam-chest and a separate exhaust-chamber, a piston mounted to rotate,and extending with its rim into an annular slot in the cylinder-wall,the piston being provided with oppositely-arranged ports, one of whichis the inlet-port, a piston-head carried by said piston and extendinginto said cylinder, abutments slidable in the said cylinder, and areversing-valve on one face of the said piston, and arranged to uncoverone of the piston-ports to the steam-chest, to allow the motive agent topass through the uncovered port into the cylinder, the saidreversing-valve being formed at its inner face with a cavity, forconnecting the covered-up piston-port with an exhaust-port formed in thepiston and leading to the exhaust-chamher, the reversing-valve beingalso provided with shoulders adapted to be engaged by a lug on thepiston, for carrying the Valve around, said valve being free to beturned from the outside of the cylinder, for reversing purposes,substantially as shown and described.

5. A rotary engine, provided with a continuous cylinder'formed with anannular slot in its wall, a piston extending with its periphery into thesaid slot, packing-rings engaging the said piston at the slot in thecylinder, a yoke embracing the cylinder and pins thereon engaging andholding the packingrings in contact with the piston, substantially asshown and described.

6. A rotary engine, provided with a com tinuous cylinder formed with anannular slot in its wall, a piston extending with its periphery into thesaid slot, packing-rings engaging the piston at the slot in thecylinder, means for holding the packing-ringsin contact with the piston,said means comprising a yoke embracing the cylinder slidable pinscarried thereby and engaging the packingrings, and devices for movingthe pins inward and holding the same in position after adjustment,substantially as shown and described.

WILLIAM MOHR.

Witnesses:

WILLIAM ARMBRUSTER, JOSHUA ENGLAND.

